Abstract
In the present study, a wearable coplanar waveguide fed flexible microstrip antenna is proposed, which is based on the floating-ground backplane. When the antenna is placed on a high-loss human body, the antenna maintains reasonable impedance matching and exhibits a peak gain of 5.6 dBi. Moreover, the performance of the antenna under different bending radii and crumpling conditions is also analyzed. The simulation and experimental results show that the bending and crumpling have little effect on the impedance bandwidth and radiation pattern of the proposed antenna. Accordingly, it is concluded that the proposed antenna has great robustness. Furthermore, it is found that the proposed floating-ground backplane structure significantly reduces the backward radiation of the planar antenna and enables the antenna to obtain a very low specific absorption rate (SAR) and increase the antenna gain. It should be indicated that antennas with great robustness, very low SAR, and small size are ideal candidates for wearable applications.
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